#include<stdio.h>
int main(int argc,char const *argv[]){
    struct book{
        char title[51];
        char author[30];
        float value;
    };
    struct book gift ={
        "The Pious Pirate and the Devious Damsel",
        "Renee Vivotte",1.95
    };//结构的初始化可以这样,内容之间用“，”隔开
    struct book gift2 = {
        .value = 10.99
    };//可以这样初始化结构的内容，只初始化value
    struct book gift3 = {
        .value = 0.66,
        .author  = "James Broadfool",
        0.25
    };//这样初始化value的值是0.25
}